Products

Butterfly Valves

Butterfly Valve Detail

A thinner design makes the Butterfly Valve versatile and well suited for the industrial management of high volumes low-pressure flow of liquids and gasses. Butterfly Valves are excellent for large-flow and pressure applications as well.

Liners are available in EPDM (Standard), Nitrile, and Teflon, and come with two separate Disc options:

Stainless Steel CF8M for use with abrasive and corrosive media such as acids, alkalis, chemicals, and diesel. Must be used with a suitable NBR or Teflon Liner
NPDI for use with idle or non-abrasive or corrosion-resistant media such as water, oil and gas. Can be used with a suitable EPDM Liner

Range

Ductile Iron Butterfly Valve
Trigger Lever VT-N

Weight: 3kg – 27kg

Sizes: DN 50 – 300

Class: 150

Pressure: PN16

Temperatures: -10°C to 120°C

Ductile Iron Butterfly Valve
Gearbox VT-N

Weight: 5.3kg – 316kg

Sizes: DN 50 – 700

Class: 150

Pressure: PN16

Temperatures: -10°C to 120°C

Cast Iron Butterfly Valve
Trigger Lever VT

Weight: 3kg – 34kg

Sizes: DN 50 – 300

Class: 125

Pressure: PN14

Temperatures: -10°C to 120°C

Cast Iron Butterfly Valve
Handwheel VT

Weight: 9kg – 205kg

Sizes: DN 50 – 700

Class: 125

Pressure: PN14

Temperatures: -10°C to 120°C

Butterfly Valve Price and Stock Availability

NPS	NPS1##	NPS2##	2	2.5	3	4	5	6	8	10	12	14	16	18	20	24	28
DN	##	##	50	65	80	100	125	150	200	250	300	350	400	450	500	600	700
CF8M SS Disc EPDM Seat Gearbox	Ductile Iron TVTSSG/BN	Quantity	15	17	14	19	17	18	4	16	0	12	0	0	2	0
		Price	R570	R670	R705	R930	R1,350	R1,490	R2,646	R4,100	R5,850	R8,200	R13,750	R17,700	R23,100	R39,930
	Cast Iron TVTSSG/B	Quantity	0	12	8	10	23	47	0	0	0	0	0	0	0	0
		Price	R570	R670	R705	R930	R1,350	R1,490	R2,646	R4,100	R5,850	R8,200	R13,750	R17,700	R23,100	R39,930
CF8M SS Disc EPDM Seat Trigger Lever	Ductile Iron TVTSST/LN	Quantity	0	0	99	97	1	31	45	11	0	Only available with a Gearbox	##	##	##	##	##
		Price	R350	R430	R480	R725	R1,060	R1,360	R2,300	R3,700	R5,660	Only available with a Gearbox	##	##	##	##	##
	Cast Iron TVTSST/L	Quantity	0	0	0	0	0	8	0	0	21	Only available with a Gearbox	##	##	##	##	##
		Price	R350	R430	R480	R725	R1,060	R1,360	R2,300	R3,700	R5,660	Only available with a Gearbox	##	##	##	##	##
NPDI Disc EPDM Seat Gearbox	Ductile Iron TVTNPDIG/BN	Quantity	5	0	2	39	0	30	12	5	3	17	0	5	0	0
		Price	R550	R595	R635	R800	R985	R1,125	R1,810	R2,550	R3,450	R4,500	R8,700	R11,000	R14,200	R24,500
	Cast Iron TVTNPDIG/B	Quantity	20	7	0	0	12	31	15	0	0	0	0	7	0	1	0
		Price	R550	R595	R635	R800	R985	R1,125	R1,810	R2,550	R3,450	R4,500	R8,700	R11,000	R14,200	R24,500	R38,150
NPDI Disc EPDM Seat Trigger Lever	Ductile Iron TVTNPDIT/LN	Quantity	20	0	0	224	0	200	40	5	0	Only available with a Gearbox	##	##	##	##	##
		Price	R305	R370	R385	R545	R735	R945	R1,430	R2,170	R2,990	Only available with a Gearbox	##	##	##	##	##
	Cast Iron TVTNPDIT/L	Quantity	30	24	0	0	31	6	0	25	23	Only available with a Gearbox	##	##	##	##	##
		Price	R305	R370	R385	R545	R735	R945	R1,430	R2,170	R2,990	Only available with a Gearbox	##	##	##	##	##

Please click here to review Valvetech T&C’s. Price and Stock are subject to change. All prices Exclude Drilling and are Exclusive of VAT. Last Updated: 23/07/2024

Application

The Wafer Style Butterfly Valve has lugs to secure and align the valve with two mating flanges. From DN50 to DN300, a 90° rotation of the handle opens or closes the valve. For sizes larger than DN300, a gearbox and handwheel enables full and partial opening and closing operations.

The disk is approximately the same size as the adjoining pipe and rotates on a vertical axis. Because the seat is softer, the disc gets pressed firmly against it creating a tight seal when closed.

Advantages:

Low maintenance costs as there are minimal moving parts
No spaces where pockets of gas and media can accumulate
Low pressure drop when fully opened, but can also be used in high flow rate applications
Easy installation and less maintenance as the valve is thin
Economical savings due to its reduced weight and space requirements

Disadvantages:

Not advisable for high-pressure drop / differential applications; consider a Globe Valve
High-pressure applications may require multiple Butterfly Valves or additional support structures to maintain valve integrity; consider a Gate Valve
High flow rates can result in cavitation and erosion; consider a Globe Valve
The high flow-velocity can cause solid particles to impact the valve disc, leading to erosion and wear, making it not suitable for slurries; consider a Gate valve
The formation and collapse of vapor bubbles (cavitation) could lead to damage of the valve over time, consider a Gate Valve

Common Industry Uses:

Used to start, stop, and regulate flow
Agricultural purposes used by compressed air, gas, and oil
Controlling the flow, pressure, and distribution of water treatment services
Heating and Conditioning (HVAC) for regulating the flow and cooling of air, water, and gasses
Transporting chemicals, where the Butterfly Valve’s compact design and low weight make it ideal for chemical processing

Torque Figures

DN	NPS	PN6		PN10		PN16
DN	NPS	Wet	Dry	Wet	Dry	Wet	Dry
DN50	2"	13	20.8	13.9	22.1	15.1	24.2
DN65	2.5"	13.8	26.1	15.4	29.2	17.2	32.7
DN80	3"	21	39.9	21.7	41.1	23.1	43.7
DN100	4"	34.9	63.8	37.1	67.8	39.8	72.8
DN125	5"	53.8	93.8	57.9	101	61.9	108
DN150	6"	84.5	149	93.9	165	102	174
DN200	8"	154	264	173	297	192	330
DN250	10"	249	423	286	486	323	549
DN300	12"	371	605	429	699	490	799
DN350	14"	466	699	550	825	625	969
DN400	16"	632	947	755	1133	846	1307
DN450	18"	831	1246	1012	1518	1131	1787
DN500	20"	1093	1639	1350	2025	1431	2288
DN600	24"	1679	2519	2111	3166	2301	3711
DN700	28"	3008	4515	3269	4908	5670	6380

Butterfly Valve Torque is measured in Newton-Meters and is provided for both Wet and Dry media. It is the Turning Force needed to rotate the valve disc and is dependent on the Gear Ratio (number of turns to open or close the valve).